Last updated: August 21, 2025
Experience the vibrant May weather in Rio Negro, Brazil, where temperatures range from a pleasant 16°C (61°F) on average to a maximum of 28°C (83°F). As you explore this picturesque locale, be prepared for cooler nights dropping to a chilly 2°C (35°F). May also brings approximately 87 mm (3.4 in) of rain over 8 days, contributing to the region's lush greenery. With humidity levels soaring at 86%, the atmosphere is rich and alive, inviting locals and visitors alike to revel in the beauty of nature while embracing a mix of warmth and refreshing rain.
May in Rio Negro, Brazil marks a noticeable shift in temperatures, ushering in cooler days as the region transitions from the warmer months. With minimum temperatures dipping to 2°C (35°F) and an average around 16°C (61°F), it's a time ripe for cozy clothing. The maximum temperature reaches a comfortable 28°C (83°F), still warm enough to enjoy the outdoors. This month showcases a significant cool-down from the preceding months, highlighting a trend toward more moderate and enjoyable weather. As a result, May is ideal for those seeking to explore the lush landscapes without the intense heat of summer, making it a perfect opportunity for outdoor adventures amidst the crisp air.
In May, Rio Negro experiences a moderate increase in precipitation, with 87 mm (about 3.4 inches) of rain falling over 8 days. This marks a notable uptick from the previous month, April, which recorded just 47 mm (1.9 in) across only 5 days. Although May's rainfall is still lower than the peak months of January and October, it maintains the trend of transitioning into a wetter season as the region approaches the cooler months. As the rainy days extend into June, the monthly rainfall is expected to rise, highlighting the shift towards a more humid climate typical of the Brazilian winter. Thus, May serves as a bridge between the lower rainfall of early autumn and the increased precipitation that follows.
In Rio Negro, Brazil, May continues the trend of high humidity, maintaining a level of 86%, consistent with the preceding months of January through April. This seasonal stability reflects the region's tropical climate, where humidity seldom dips significantly. As the year unfolds, humidity gradually decreases, with a notable drop to 80% in July, showcasing a shift as winter approaches. Interestingly, this mid-year dip is followed by a slight rebound in the humidity levels during the latter months, peaking again at 86% in November. Thus, Rio Negro presents a captivating ebb and flow of humidity, where the lushness of its environment is sustained in part by the relentless embrace of moisture year-round.
In May, Rio Negro experiences a notable shift in its UV index, dropping to 8, which falls under the very high exposure category. This change allows for a slightly longer burn time of 15 minutes, offering a brief respite compared to the extreme levels seen earlier in the year. Following a pattern of elevated UV levels, with January and February reaching a staggering 15, May remains a month where sun protection is still crucial. As temperatures continue to rise in the approaching winter months, understanding the UV trends is vital for safely enjoying the outdoors. For more information, visit the Rio Negro UV Index.
UV Risk Categories
In May, Rio Negro, Brazil, enjoys a delightful average of 225 hours of sunshine, a number that reflects the pleasant transition from the vibrant summer months into the cooler seasons. This month typically sees a slight dip from the peak brightness of March with its impressive 273 hours, but it maintains a warm glow as sunshine gradually decreases through June. The trend shows that May is well-placed within a stellar spring lineup, bridging the gap between the vibrant sunlight of early year and the initial hints of winter, making it a lovely time to enjoy outdoor activities against the backdrop of stunning Brazilian landscapes.
May in Rio Negro, Brazil, brings a notably increased chance of sunny weather, with 44% likelihood of sunshine. This marks an upward trend from the cooler months of March and April, where the chances hovered around 29% and 37% respectively. Following May, the sun shines even brighter in July with a peak of 53%, suggesting that the onset of winter provides uplifting, clear days. As the year progresses toward the end, the chances of sunshine dwindle, with a striking dip in January at just 12%. Thus, May stands out as a delightful transition into sunnier conditions, making it an ideal time for outdoor activities in Rio Negro.
In Rio Negro, Brazil, the rhythm of daylight duration showcases a captivating seasonal transition. As the year unfolds, January begins with a generous 13 hours of daylight, gradually tapering to 10 hours by May and persisting through June and July. This decline heralds the winter months, where the sun lingers less in the sky. However, as August approaches, daylight begins its subtle resurgence, inching back up to 11 hours by the month's end. By the time we reach November and December, the cycle completes itself, with daylight returning to the 13-hour mark, illuminating the vibrant landscapes once more. This cyclical dance of light and shadow not only influences daily life in Rio Negro but also paints a vivid portrait of the region's climatic rhythm.
In May, the wind in Rio Negro, Brazil experiences a gentle breeze with an average speed of 2.5 m/s (6 mph), slightly lower than the previous month. This reflects a trend of relatively stable wind patterns, with January kicking off the year at its peak of 3.1 m/s (7 mph). The months leading up to May show a gradual decline, most notably in March, when the winds dipped to their seasonal low of 2.4 m/s (5 mph). Following this, winds pick up again slightly in June, reaching 2.7 m/s (6 mph), hinting at the seasonal shifts that characterize the region. Overall, the moderate winds experienced in May contribute to the region's serene atmosphere, making it an ideal time for tranquil outdoor activities in the lush Brazilian landscapes.
Weather in Rio Negro varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Rio Negro, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between May and January, we see notable differences. May experiences cooler temperatures with a minimum of 2°C (35°F) and an average of 16°C (61°F), while January boasts a much warmer range, starting at a minimum of 13°C (57°F) and reaching an average of 22°C (72°F). Additionally, January is characterized by higher maximum temperatures, soaring up to 34°C (93°F) compared to May's maximum of 28°C (83°F). Precipitation is more pronounced in January, with 150 mm (5.9 in) falling over 18 days, compared to May's 87 mm (3.4 in) over just 8 days. Interestingly, both months share the same humidity level of 86%. For more details on January weather, you can check Rio Negro weather in January.
May and February showcase distinct weather patterns. In May, temperatures range from a chilly 2°C (35°F) at night to a comfortable 28°C (83°F) during the day, with an average of 16°C (61°F). The month sees significant rainfall, with 87 mm (3.4 in) over about 8 days and a high humidity level of 86%. In contrast, February experiences warmer conditions, with nighttime lows of 11°C (51°F) and daytime highs reaching 34°C (94°F). The average temperature in February is a balmy 21°C (71°F), accompanied by more rain—124 mm (4.9 in) over 15 days and slightly lower humidity at 83%. For more detailed insights, you can check Rio Negro weather in February.
In comparing the weather of May and March, it is clear that March tends to be warmer overall, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 32°C (89°F). In contrast, May's temperatures are cooler, averaging between 2°C (35°F) and 28°C (83°F). Additionally, March experiences more rainfall, accumulating 109 mm (4.3 in) over 15 days, compared to May's 87 mm (3.4 in) over just 8 days. Both months share high humidity levels, with March at 85% and May slightly higher at 86%. For more specifics on March weather, you can check Rio Negro weather in March.
In comparing the weather of May and April, we observe some notable differences. April generally experiences warmer temperatures, with an average of 18°C (65°F) compared to May's average of 16°C (61°F). The maximum temperature in April reaches 30°C (86°F), while May sees a lower maximum of 28°C (83°F). Additionally, April has less precipitation, totaling 47 mm (1.9 in) over 5 days, whereas May receives 87 mm (3.4 in) spread across 8 days, resulting in slightly higher humidity at 86%. For more detailed information on April conditions, you can check Rio Negro weather in April.
May and June exhibit notable similarities and differences in weather patterns. May shows a slightly warmer range, with average temperatures peaking at 16°C (61°F) and maximum highs reaching 28°C (83°F). In contrast, June experiences slightly cooler temperatures, with an average of 15°C (59°F) and maximum highs of 26°C (79°F). Precipitation is more pronounced in June, with 118 mm (4.6 in) falling over 10 days, compared to May's 87 mm (3.4 in) over 8 days. Humidity levels remain relatively consistent, with May at 86% and June slightly lower at 85%. For a detailed look at June weather in this region, visit Rio Negro weather in June.
In comparing the weather between May and July, May presents a broader range of temperatures, with minimums around 2°C (35°F), an average of 16°C (61°F), and maximums peaking at 28°C (83°F). The month also experiences higher precipitation levels, totaling 87 mm (3.4 in) over approximately eight days, and average humidity at 86%. In contrast, July sees cooler conditions, with minimums plummeting to -4°C (26°F) and a slightly lower average temperature of 14°C (57°F), and maximums reaching 26°C (79°F). Precipitation drops significantly to 27 mm (1.0 in), occurring over just four days, with humidity at 80%. For a more detailed look at July conditions, you can visit Rio Negro weather in July.
May and August present contrasting weather patterns, with May generally being milder and more humid. In May, temperatures range from a minimum of 2°C (35°F) to a maximum of 28°C (83°F), with an average temperature of 16°C (61°F) and significant humidity at 86%. The month sees around 87 mm (3.4 in) of precipitation over approximately 8 days. In contrast, August experiences a slightly cooler temperature range, with a minimum of -1°C (30°F) and a maximum of 30°C (87°F), resulting in a lower average of 15°C (59°F). Precipitation in August is also less, totaling 79 mm (3.1 in) over about 7 days, with humidity dropping to 79%. For more specific details, check out Rio Negro weather in August.
May brings a cool and humid atmosphere, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 28°C (83°F) and an average of 16°C (61°F). It experiences more precipitation, totaling 87 mm (3.4 in) over about 8 days, contributing to a humidity level of 86%. In contrast, September offers slightly warmer temperatures, with a minimum of 5°C (42°F) and a maximum of 32°C (90°F), averaging 18°C (65°F). Rainfall in September is less frequent, amounting to 69 mm (2.7 in) over the same number of days, and the humidity is slightly lower at 82%. For more detailed insights on September weather, check out Rio Negro weather in September.
May and October offer distinct weather patterns, each with its unique characteristics. In May, temperatures fluctuate from a minimum of 2°C (35°F) to a maximum of 28°C (83°F), with an average of 16°C (61°F). The month sees around 87 mm (3.4 in) of precipitation over approximately 8 days, accompanied by high humidity levels of 86%. In contrast, October experiences slightly warmer temperatures, ranging from a minimum of 6°C (44°F) to a maximum of 34°C (93°F), with an average temperature of 18°C (65°F). It is also wetter, with about 147 mm (5.8 in) of rainfall across 14 days and a lower humidity of 82%. For a closer look at October conditions, you can check Rio Negro weather in October.
In comparing the weather between May and November, we see notable differences in temperature and precipitation. In May, temperatures range from a chilly minimum of 2°C (35°F) to a comfortable average of 16°C (61°F), peaking at 28°C (83°F). The month experiences about 87 mm (3.4 inches) of precipitation over 8 days, with humidity levels remaining high at 86%. In contrast, November shows a warmer profile with a minimum temperature of 8°C (46°F) and an average of 19°C (67°F), reaching a maximum of 31°C (89°F). Additionally, November is slightly wetter, with 103 mm (4.1 inches) of rainfall spread over 13 days, but the humidity remains constant at 86%. For more specific details about weather conditions in November, you can visit Rio Negro weather in November.
May and December exhibit notably different weather patterns. In May, temperatures range from a minimum of 2°C (35°F) to a maximum of 28°C (83°F), with an average of 16°C (61°F). The month sees around 87 mm (3.4 in) of precipitation over approximately 8 days and humidity levels are high at 86%. In contrast, December presents a milder climate, with minimum temperatures of 11°C (52°F) and highs reaching 34°C (93°F), averaging 21°C (70°F). December experiences increased precipitation, totaling 137 mm (5.4 in) over 17 days, along with slightly higher humidity at 88%. For more details, check out Rio Negro weather in December.
As May graces Rio Negro, visitors can expect a refreshing shift in weather compared to the sweltering summer months. Temperatures dip to a more comfortable average, providing a pleasant break from the heat, while the increased humidity adds a touch of tropical richness to the air. Rainfall becomes more frequent, with several days of precipitation contributing to the lush landscape. This transitional month offers a unique blend of mild temperatures and greenery, making it an ideal time for those looking to explore the natural beauty of the region. For a deeper insight into the weather patterns throughout the year, check out Rio Negro Climate.